Title

Post-Fabrication Voltage Controlled Resonance Tuning Of Nanoscale Plasmonic Antennas

Keywords

aluminum; anodization; gold nanoparticle; image dipole; plasmon resonance tuning; single particle spectroscopy

Abstract

Voltage controlled wavelength tuning of the localized surface plasmon resonance of gold nanoparticles on an aluminum film is demonstrated in single particle microscopy and spectroscopy measurements. Anodization of the Al film after nanoparticle deposition forms an aluminum oxide spacer layer between the gold particles and the Al film, modifying the particle-substrate interaction. Darkfield microscopy reveals ring-shaped scattering images from individual Au nanoparticles, indicative of plasmon resonances with a dipole moment normal to the substrate. Single particle scattering spectra show narrow plasmon resonances that can be tuned from ∼580 to ∼550 nm as the anodization voltage increases to 12 V. All observed experimental trends could be reproduced in numerical simulations. The presented approach could be used as a general postfabrication resonance optimization step of plasmonic nanoantennas and devices. © 2012 American Chemical Society.

Publication Date

7-24-2012

Publication Title

ACS Nano

Volume

6

Issue

7

Number of Pages

6301-6307

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1021/nn301742p

Socpus ID

84864185903 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84864185903

This document is currently not available here.

Share

COinS